Dust deflector



Sept 1933- G. s. KELLEY 1,928,291

DUST DEFLECTOR Filed Dec. 30, 1931 IN VEN TOR.

64901176 lfelley. BY -44 111.5 ATTORNEY.

Patented Sept. 26, 1933 UNITED STATES PATENT OFFICE DUST DEFLECTOR Application December 30, 1931 Serial No. 583,877

1 Claim.

This invention relates to dust deflectors, but more particularly to a dust deflector adapted for use in connection with rock drilling apparatus, as for instance, of the type wherein the rock drill is supported by a suitable mounting, such as a shell.

One object of the invention is to prevent rock dust from intermingling with the atmosphere adjacent thedrilling site.

Another object is to enable the deflector to be conveniently and quickly disposed about the drill steel.

A further object is to enable the deflector to be disposed about the drill steel without necessitating the removal of the drill steel from the drill hole or from the rock drill.

Still another object is to rigidly support the deflector with respect to the drill hole and the drill steel.

Other objects will be in part obvious and in part pointed out hereinafter.

In the drawing accompanying this specification and in which similar reference characters refer to similar parts,

Figure 1 is a side elevation, partly in section,

of a dust deflector constructed in accordance with the practice of the invention and showing it applied to a rock drilling apparatus of the drifter Figure 2 is a top plan view of the deflector taken through Figure 1 on the line 2--2 looking in the direction indicated by the arrows,

Figure 3 is an elevation in section of the deflector taken through Figure 2 on the line 3-3 looking in the direction indicated by the arrows,

Figure 4 is a transverse view taken through Figure 1 on the line 44 looking in the direction indicated by the arrows,

Figure 5 is a view similar to Figure 4 illustrating'the manner in which a deflector may be opened to apply it to a drill steel, and

Figure 6 is a transverse view of a detail taken through Figure 1 on the line 66 looking in the direction indicated by the arrows.

Referring more particularly. to the drawing,

designates a rock drill illustrated as being of the drifter type and B a shell upon which the rock drill A may be slidably mounted in a well known manner. The shell B is provided with the usual cone C which is engaged by a clamp D mounted upon a column E whereby the drilling apparatus is supported.

Extending into the rock drill is a working implement in the form of a drill steel F against which the percussive element (not shown) of the rock drill A acts for driving it into the rock G. The drill steel F is illustrated as being of a well known type having an enlarged cutting bit H at its front end for drilling a hole J in the rock G, and near the rear end of the drill steel are enlargements or lugs K which may interlock with chuck mechanism L in the front end of the rock drill A to prevent ejection of the drill steel F from the rock drill.

The dust deflector constructed in accordance with the practice of the invention, and which is designated in its entirety by 0, comprises a casing P of flexible material, as for instance rubber, which in practice is adapted to be seated upon the rock face G to surround the inlet opening of the drill hole J.

The casing P is preferably of generally cylindrical form and at its front end has an inwardly tapering section Q of which the edge R seats upon the rock G. At the rear end of the casing P is a wall S having an aperture T therein to accommodate the body portion U of the drill steel F. The aperture T is preferably of substantially the same diameter as the body portion U of the drill steel to effect an adequate seal between the casing and the drill steel at the rear end of the casing.

Within the casing P is a dust chamber V into which the dust from the drill hole 3 may pass through an enlarged opening W in the front 8; end of the casing.

On the s1de of the casing P and preferably forming an integral part thereof is an extension X having an aperture Y which serves as the outlet opening for the chamber V. In the construction shown a pipe Z is disposed in the aperture Y and is connected with its other end to a conduit b which may lead to a suitable evacuating device, as for instance a blower (not shown), whereby the dust and cuttings may be drawn from the drill 95 hole J.

In order to enable the casing P to be readily applied laterally to the drill steel F at any point intermediate the ends thereof the said casing P is split longitudinally as at c so that the casing may be conveniently openedto permit the drill steel F to pass therethrough. Any suitable means may be provided for maintaining the casing P closed about the drill steel, as for instance hasps d secured to the casing on one side of the split c 1% and being adapted to engage buttons or lugs e secured to the casing on the opposite side of the split 0.

To the end that the casing P may be held. in a correct operative relationship with respect ts the drill steel F and the drill hole J said casing is provided with a guide rod I which is clamped, in the present instance, to the pipe Z and extends slidably into a guide member g arranged in parallelism'with the rock drill A. Preferably the guide member 9 is disposed on the same side of the shell B as the cone C and is provided with suitable brackets or lugs h which are secured to the shell B as by means of bolts 9'.

Any convenient means may be provided for clamping the guide member 9 and the guide rod 1 together. A preferred means of accomplishing this is illustrated in the form of a screw is having a lever 0 whereby it may be manipulated. The screw k extends through an aperture 12 in a head q of the guide member g and is in engagement with a threaded aperture 1' in said head q. The apertures p .and 1' which are in alignment lie on opposite sides of a longitudinally extending slot 8 in one side of the guide member g.

In practice, after the drilling apparatus has been set in the correct position with respect to the rock G the casing P may be opened in the manner illustrated more particularly in Figure 5 and may then be disposed about the drill steel F. After the hasps d are closed the screw k may be manipulated to clamp the guide member g securely to the guide rod 1. The casing P will then be maintained in the proper operative position throughout the drilling operation.

As the rock drill A advances in the direction of the work the Working implement F will pass readily through the aperture T, although by suitably proportioning the aperture T an adequate seal may be maintained between the wall S and the drill steel F to prevent the escape of dust at this point from the chamber V. After the drill hole has been completed, or whenever it is desired to change drill steels, the hasps (1 may be disengaged from the buttons 2 and the casing P may then be opened to swing said casing out of the path of the drill steel.

I claim:

The combination with a rock drill, a drill steel and a mounting for the rock drill, of a casing adapted to be seated over a hole being drilled and having a chamber to receive dust from such hole, said casing being longitudinally split to enable it to be applied laterally to the drill steel, a conduit for conveying dust from the chamber, a tubular guide member carried by the mounting and having an integral clamp member, a rod connected to the conduit and extending slidably into the guide member, and means for clamping the clamp member to the rod for retaining the casing in the correct operative relationship with respect to the drill steel.

GEORGE S. KELLEY. 

